NDLTD, the Networked Digital Library
of Theses and Dissertations. NDLTD provides information and a
search engine for electronic
theses and dissertations (ETDs), whether they are open access or not.

Proquest Theses and Dissertations (PQDT), a database of
dissertations and
theses, whether they were published electronically or in print, and mostly available for purchase. Access to PQDT may be limited; consult your local library
for access information.